Grouped table

Group by publisher Group by genre
How this page is built the gem renders it — this is all you write

Grouping is a render-time arrangement, like the layout. Add group_by: :publisher — the gem orders by the group key, splits the rows into collapsible groups (chevron in the header) and shows a per-group count. With 120 books, groups start collapsed beyond config.group_collapse_threshold (default 50), opening only the first; the open ones live in ?open=, so a half-expanded view is copy-pasteable.

app/views/groups/index.html.erb 
<%= crud_collection @books, group_by: :publisher %>   <%# belongs_to, enum or a column %>

Read more: Grouping

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Cover Title Author names Genre Price Publisher Active
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— 4
Tor Books 4
The Hidden Garden 16 Joe Abercrombie, Ted Chiang, and Becky Chambers Fiction 30.44 € Tor Books ✓
The Quiet Machine 31 Margaret Atwood Fiction 21.83 € Tor Books ✓
The Ancient Engine 32 Octavia Butler Fiction 33.11 € Tor Books ✓
The Endless Station 47 Joe Abercrombie and Kim Robinson Fiction 26.37 € Tor Books ✓
Ace 4
Orbit 6
The Hidden Forest 40 Martha Wells, Joe Abercrombie, and Mary Shelley Fiction 37.54 € Orbit ✓
The Broken Machine 61 Ann Leckie Fiction 30.16 € Orbit ✓
The Ancient City 72 Stanisław Lem, Mary Shelley, and Frank Herbert Fiction 34.41 € Orbit ✓
The Silent City 75 Iain Banks and Octavia Butler Fiction 44.32 € Orbit ✓
The Distant Station 106 Frank Herbert and Mary Shelley Fiction 12.86 € Orbit ✓
The Hidden Dune 110 Iain Banks, Joe Abercrombie, and Frank Herbert Fiction 40.26 € Orbit ✓
Gollancz 3
DAW 3
The Luminous Ocean 25 Margaret Atwood Fiction 37.67 € DAW ✓
The Burning Station 87 Adrian Tchaikovsky and Joe Abercrombie Fiction 15.13 € DAW ✓
The Dispossessed Archive 114 Octavia Butler and Joe Abercrombie Fiction 8.47 € DAW ✓
Baen 8
Del Rey 3
The Burning Machine 8 Margaret Atwood and Becky Chambers Fiction 38.02 € Del Rey ✓
The Broken Empire 43 Ursula Le Guin Fiction 20.31 € Del Rey ✓
The Silent Winter 120 Iain Banks Fiction 16.22 € Del Rey ✓
Vintage 6